# au vs Not Not

The clearest difference is rating: Not Not at 4.7 against au's 3.7. Not Not also leads on review sentiment (78% vs 57%) and ratings volume (1.1K vs 36). au's advantage is ads (none vs shown) and iOS requirement (8.0 vs 15.0). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. au sells 3 one-off in-app purchases and Not Not sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Not Not holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: Not Not has 1.1K ratings behind it against 36, so its average is the more settled of the two. Written reviews point the same way: 57% of au's written reviews are positive against 78% of Not Not's.

au ships an update every 5 weeks, Not Not every 2 weeks. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | au | Not Not |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (36 ratings)](https://appshunter.io/ios/app/au/id931199028/reviews) | **[4.7 (1.1K ratings)](https://appshunter.io/ios/app/not-not-a-brain-buster/id1107589341/reviews)** |
| Number of ratings | 36 | **1.1K** |
| Positive reviews | 57.4% of reviews | **78.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 12 MB | 75 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [General Adaptive Apps Pty Ltd](https://appshunter.io/developer/937589555) | [Alternative Shift](https://appshunter.io/developer/394617049) |

## What reviewers say

### au

[App page](https://appshunter.io/ios/app/au/id931199028)

A challenging puzzle game where players control speed by touching and lifting off the screen. Navigate through levels, collect dots, and avoid collisions. Compete for high scores and unlock new levels.

**Highlights:** Touch and hold to control speed, Collect all dots, Avoid collisions, 150 challenging levels, Leaderboard and medals, Replay past levels, Skip difficult levels

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Skip au Level | $0.99 | one-time |
| Remove au Ads | $1.99 | one-time |
| Unlock All of au | $3.99 | one-time |

**What reviewers like**

- 🤩 Addicting and fun
- 👍 Great series of games
- ✨ Simple and enjoyable
- 💯 Best game ever
- 😍 Amazing app

**What reviewers complain about**

- 😠 Impossible to beat levels
- 🤔 Levels are confusing
- 👎 Not intuitive
- 💸 Feels like a money grab
- 😵 Stupid and rageous

**Reported bugs**

- Stops you from placing last piece
- Level 39 needs to be fixed
- Game crashes on open
- No visible change of speed

**Requested features**

- Make more apps
- Explain how to play latest game
- Update with bug fixes
- Provide instructions or tutorial
- Fix crashing issue


### Not Not

[App page](https://appshunter.io/ios/app/not-not-a-brain-buster/id1107589341)

Engage your brain with a logic and orientation puzzle game. Swipe your character according to increasingly complex instructions to reach higher levels. Offers two addictive game modes for a satisfying challenge.

**Highlights:** Logic and orientation challenges, Swipe-based character control, Increasingly complex instructions, Classic game mode, Challenge game mode, Addictive gameplay

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $0.99 | one-time |
| Unlock World : The Liar | $0.99 | one-time |
| Emergency Kit | $0.99 | one-time |
| First Aid Kit | $0.99 | one-time |
| Survival Kit | $2.99 | one-time |
| Complete Kit | $4.99 | one-time |
| Immortal Kit | $9.99 | one-time |
| Ultimate Kit | $29.99 | one-time |

**What reviewers like**

- 🧠 Challenges the brain
- 🕹 Engaging and addictive gameplay
- 🕰 Good time-killer
- 👍 Simple yet effective game mechanics

**What reviewers complain about**

- 📺 Excessive ads and monetization
- 🐛 Bugs and technical issues
- 🔄 Language settings reset after each session
- 🔍 Difficulty progression can be uneven

**Reported bugs**

- Game freezes on startup
- Purchased ad removal not working
- Inconsistent swipe/input detection

**Requested features**

- More levels and game modes
- Option to disable music/sound effects
- Improved accessibility for color-blind players


## Frequently asked questions

### Is au free?

au is free to download, with in-app purchases available.

### Is Not Not free?

Not Not is free to download, with in-app purchases available.

### Which has better reviews, au or Not Not?

Not Not is rated higher. au averages 3.7 out of 5 from 36 ratings, while Not Not averages 4.7 from 1.1K ratings.

### Do au or Not Not have ads?

Not Not shows ads; au does not.

### Which is updated more often, au or Not Not?

au ships an update every 5 weeks, and Not Not every 2 weeks. Most recently, au was updated on November 1, 2026 and Not Not on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*